1: 2,3-dihydro-thieno[3,4-b][1,4]dioxine With n-butyllithium in tetrahydrofuran T=-78°C; 1 h; Inert atmosphere; 2: With zinc(II) chloride in tetrahydrofuran 1.33333 h; Inert atmosphere; 3: p-bromophenyl bromide With tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran T=50°C; 72 h; Inert atmosphere;

tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran Stille coupling; 24 h; Inert atmosphereReflux;